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` J; '/L. CHAPMAN AUTOMTIGSTOP VALVE. No. 334,640.l Patented Jan. 19, 1886.l

WJNEsSES; JNI/ENTOR A amg@ WW ATTORNEY.

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' J. L. CHAPMAN.

` AUTOMATIC STOP VALVE. No. 334,640. Patented Jan. 19, 1886.4

W] T NESSES Y INI/ENTOR 'A TTORNE Y (No Model.) 3 Sheets-Sheet 3.

J. L. CHAPMAN.

AUTOMATIC STOP VALVE.

No. 334,640. Patented Jan. 19. 1886.

` IIIIIIIN WITNESSES.- I kNVENTo/e d1.. ee.

W y W ATTORNEY JOSEPH L. CHAPMAN, OF HADDONFIELD, NEW JERSEY.

AUTOMATIC STOP-VALVE.

SPECIFICATION forming part of Letters Patent No. 334,640, dated January 19, 1886.

Application filed May 17.. 1885. Serial No. 165,161. (No model.)

To ctZZ whom it may concern.-

Be it known that I, JosnrH L. CHAPMAN, of Haddonield, in the county of Camden and State of New Jersey, have invented a new and valuable Improvement in Automatic Stop- Valves; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawings, making a part of this specification, and to the letters and iigures of reference marked thereon.

Figure 1 is a longitudinal vertical section of a stop or cut-off for gas embodying my improvement.l Fig. 2 is an inverted plan, partly sectional, on line l l, Fig. 1. Fig. 3 is a side elevation; Fig. 4, a plan 5 and Fig. 5 is an enlarged sectional plan of a portion of the diaphragm and rod attachment secured thereto.

My invention has relation to automatic stop or cut-offs for preventing natural or other gases entering the supply or burner pipes after the tlow has stopped; and it has for its object simplicity and durability of construction.

My invention, accordingly, consists of the combination, construction, and arrangement of parts, as hereinafter more particularly described and claimed.

In the drawings, A represents the stop or cutoff casing, which is oblong in shape and is composed of hollow upper and lower sections, B and C, respectively, forming an inner chainber, A', and each of which is provided with side lugs, b and c, through which pass fastening-bolts D,to provide fordetaching one casingsection from the other for repairs or other purposes.v The meeting-edges of these sections are trued or finished to provide a true or light joint between them, and, if desired, any suitable packing or red lead may be used to further insure a sealed j oint between said sections. The upper section, B, has at one end a chamber, E, in one end of which is an inlet-opening, c. It is also provided with a bottom opening, e, and a top opening, e2;y The upper edge, c3, of bottom opening, e', forms a seat, e4, for a valve, f, having astem, F, the upper end, f', of which enters and works in a tubular nipple or plug, G, screwed into top opening, e2, of chamber E. The lower end,f2, of said valve-stem F is secured to end h of a lever, H, which, at its opposite end, h', is pivoted to lugs h3, formed on the bottom side of an outlet opening, b', on section B. The outlet-opening b of section B 'is preferably located on a side or end opposite that in which is formed the inletopening e. The top of section B is provided with an enlarged aperture, I, to form which the sides of said section are built out, as shown at b2, and upon which rests a cap or cover, K, screwed or fastened to section B by bolts k; or other suitable fastenings may be provided, as desired, and, if desired, said cap isprovided with a vent-pipe, 7c. Between said cover and section B is interposed a flexible diaphragm, L, and the top of thc cover is formed with an eX- ternallythreaded projection, k2, having opening 7c3. Upon projection k2 screws a cap, M, which incloses an upper or handle end, a, of a rod, N, passing down through opening 7c3 and screwing into the top of a stem, Z, fastened to the center of the diaphragm L, as shown more plainly in Fig. 5. The lower end of the diaphragm stem Z is loosely jointed to the lever H, as shown, so that a manual movement of `the rod N, when cap M is unscrewed, raises diaphragm L and lever H to open valve f and admit a flow of gas to and through chamber A.

As soon as the valv'e fis raised, the cap M is returned to its place or screwed upon projection 7a2, and the pressure of the gas in the cnt-off chamber A maintains the diaphragm in an elevated position to keep valve f open as long as the gas continues to flow to and through the cutoff. When, however, the gas stops flowing into inlet-opening e, the lever H and diaphragm L drop to automatically close valve f to cut off admission to chamber A.

I have shown the cap or cover K and the diaphragm L located in the center of the cutolf casing; but, as it obviously may be otherwise located, I do not confine myself to the location shown.

What I claim isl. The combination casing-section B O, having lugs b c and fastening bolts D, the diaphragm L, having stem Z and lifting rod N, cap K, chamber E, having inlet and outlet openings e e', and valve f, having stem F, and lever H, pivoted to one of said sections and having connection with said diaphragm and valve-stems, substantially as shown and described.

ICO

2. The combination of casing-sections B C, In testimony that I claim the above I have having fastening bolts D, the diaphragm L, hereunto subscribed my name in the presence lo having stem Z and rod N, chamber E, having of two Witnesses. inlet and outlet openings e e', valve F, having 5 stem f, and lever H, pivoted to one of said seo- JOSEPH L CHAPMAN' tions and having connection with said dia- Witnesses: phragm and valve, substantially as shown, and ALLEN H. GANGEWER,

for the purpose set forth. DELANGEY G. WALKER. 

